On the persistence of memory: do initial conditions impact vortex formation?
Abstract
An investigation into redistribution of vorticity for rapidly accelerating plates with varying kinematics and initial conditions has been performed. Both three-dimensional particle tracking velocimetry and direct force measurements were applied simultaneously. The effective velocity of the feeding shear layer has been identified as the appropriate characteristic velocity rather than the commonly used plunge or free stream velocity. Based on this new normalization for circulation, it has been demonstrated that the existence of initial boundary-layer vorticity on the plunging plate – at least in the near-midplane region – does not contribute to the eventual vortex formation process. In accordance with the literature, however, the tip vortex positioning relative to the plate surface has been identified as an important contributor in the overall force production, particularly once the plate acceleration has ceased.
Additional Information
© 2013 Cambridge University Press. Received 24 March 2013; revised 19 August 2013; accepted 27 September 2013; first published online 1 November 2013. The authors gratefully acknowledge funding from the Natural Sciences and Engineering Research Council of Canada. The authors would also like to thank the reviewers for their valuable feedback.Attached Files
Published - S0022112013005284a.pdf
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Additional details
- Eprint ID
- 43013
- Resolver ID
- CaltechAUTHORS:20131216-084849250
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Created
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2013-12-16Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field